Cost optimization of reinforced concrete flat slabs of arbitrary configuration in irregular highrise building structures

Aldwaik, Mais; Adeli, Hojjat

doi:10.1007/s00158-016-1483-5

Cited by 42 publications

(25 citation statements)

References 35 publications

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“…Unlike NineStory and 37Story, which were reinforced concrete buildings, M3S and M6S4 were steel structures. Although concrete exhibits nonlinearity relatively early and tends to result in convergence difficulties (Aldwaik and Adeli, ), steel generally remains linear until it approaches the yield points, making the linear system of a steel structure better conditioned.…”

Section: Numerical Testsmentioning

confidence: 99%

Direct‐Iterative Hybrid Solution in Nonlinear Dynamic Structural Analysis

Yang

Wang

Lin

2017

Computer aided Civil Eng

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Although many advanced sparse direct solvers are widely used in structural analysis, these often require longer computing times than iterative solvers for well-conditioned structural systems. However, iterative solvers cannot efficiently solve an ill-conditioned system when a structure becomes highly nonlinear. This work proposes a hybrid solution integrating a direct solver and an iterative solver to reduce overall computing time in solving a series of linear equations arising from nonlinear dynamic structural analysis. The hybrid solution selects the iterative solver, which reuses the factorized matrices for preconditioning, and switches to the direct solver in the initial stage or when factorized matrices need updating. The performance of the hybrid solution is tested on the OpenSees platform. The results show that the hybrid solution outperforms the direct solver, even when the structure becomes highly nonlinear during analysis. C 2017 Computer-Aided Civil and Infrastructure Engineering.

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Section: Numerical Testsmentioning

confidence: 99%

Direct‐Iterative Hybrid Solution in Nonlinear Dynamic Structural Analysis

Yang

Wang

Lin

2017

Computer aided Civil Eng

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“…Optimization of reinforced concrete structures considering standard design constraints have been already studied in some papers from the literature [9], [13], [15], [19], [20]. In the context of the Brazilian design standard, some studies have also been developed, for example, Bordignon and Kripka [28], Medeiros and Kripka [29], [30], Kripka et al [31] and Correia et al [32].…”

Section: Introductionmentioning

confidence: 99%

Optimal configuration of RC frames considering ultimate and serviceability limit state constraints

Juliani

Gomes

2021

Rev. IBRACON Estrut. Mater.

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Most current structural design codes are based on the concept of limit states, that is, when a structure fails to meet one of its purposes, it is said that it has reached its limit state. In the design of reinforced concrete structures, the Ultimate Limit State (ULS) and the Serviceability Limit State (SLS) must be checked. Therefore, this paper presents an optimization scheme for reinforced concrete plane frames, in which the objective is to minimize the cost of structures for three cases of constraints: the first is related to ULS and SLS; the second refers only to the ULS; and the third is related only to the SLS. Computational routines for checking limit states of beams and columns are implemented in MATLAB, following the requirements of the Brazilian code. Structural analyses are performed by using the MASTAN2 software, taking into account geometric nonlinearities and a simplified physical nonlinearity method. The objective function considers the cost of concrete, reinforcement and formwork, and the optimization problems are solved by genetic algorithms. Two numerical examples of frames are presented. Regarding the optimal characteristics related to each type of limit state, it is noted that the beams and columns tend to have larger and more reinforced cross sections in the case of the ULS. Even so, optimal structures related to the ULS often do not satisfy SLS and vice versa, which indicates that the optimal characteristics related to each limit state may be different. In addition, it is observed that the SLS is less restrictive than ULS.

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“…Reinforced concrete slabs are the most important structural component in the construction industry and the most common practice to design any reinforced concrete slab is to start with the selection of slab type (one-way slabs, two-way slabs, waffle slabs, flat slabs, or pre-cast or pre-stressed slabs) [1]. The most common type of slabs used in the construction industry is the flat slab.…”

Section: Introductionmentioning

confidence: 99%

Structural analysis and design of irregular shaped reinforced concrete slabs using a simplified design method

Al‐Ansari¹,

Afzal²

2020

JSEAM

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This paper presents a simplified method to analyze and design the irregular reinforced concrete slabs based on structural safety and economy. The triangular, trapezoidal, and curved slab sections are selected in this study to be analyzed and designed using a simplified design method approach (SDM) as these sections are the most common type of irregular slab sections used in the construction industry. Flexural design formulas for triangular and curved slabs are derived based on the theoretical principles of plate and yield line theories and ACI building code of design constraints. Numerical examples are presented in this study to illustrate the method capability of designing the most commonly used irregular slabs sections. The complete design of four triangular slabs (TS-1 to TS-4) and four curved slabs (CS-1 to CS-4) is provided in this study. Besides, the required equivalent (triangular and rectangular) shaped sections are provided to deal with irregular trapezoidal slab section. The selected irregular slab sections (triangular and curved slab sections) are also analyzed and designed using the computer software (SAFE) and the results obtained are compared with the numerical solutions. The percentage difference of the simplified method with the finite element software (SAFE) ranges from 4% to 12%. The results obtained for all the selected irregular shaped slab sections indicates that the SDM is a good and quick approach to design irregular (triangular and curved) slab sections.

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Cost optimization of reinforced concrete flat slabs of arbitrary configuration in irregular highrise building structures

Cited by 42 publications

References 35 publications

Direct‐Iterative Hybrid Solution in Nonlinear Dynamic Structural Analysis

Direct‐Iterative Hybrid Solution in Nonlinear Dynamic Structural Analysis

Optimal configuration of RC frames considering ultimate and serviceability limit state constraints

Structural analysis and design of irregular shaped reinforced concrete slabs using a simplified design method

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